Which risk increases when mafic lava cools rapidly?

💡 Explanation

Increased surface contraction causes increased likelihood of columnar jointing, a form of tensile fracturing, because rapid cooling generates thermal stress exceeding the tensile strength of the basalt; therefore enhanced joint propagation occurs, rather than ductile textures.

• Which phenomenon explains the deflection effect on ocean currents caused by Earth's rotation, influencing global heat distribution?
• What outcome is observed when excessive topsoil erosion exposes underlying loess deposits to increased surface runoff events from agricultural irrigation?
• Which geological change results when acidic rainwater interacts with fractured limestone?
• After magma ascends following substantial eruptions, which volcanic structure readily develops due to effusive activity?
• Which outcome occurs when wave energy increases at headlands?
• Which flow pattern change results when a warm ocean stream destabilizes adjacent cold water?